package com.atguigu.gulimall.product.service.impl;

import com.atguigu.common.utils.PageUtils;
import com.atguigu.common.utils.Query;
import com.atguigu.gulimall.product.dao.CategoryDao;
import com.atguigu.gulimall.product.entity.CategoryEntity;
import com.atguigu.gulimall.product.service.CategoryService;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import org.springframework.stereotype.Service;

import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;


@Service("categoryService")
public class CategoryServiceImpl extends ServiceImpl<CategoryDao, CategoryEntity> implements CategoryService {
//
//    @Resource
//    private CategoryBrandRelationService categoryBrandRelationService;

    @Override
    public PageUtils queryPage(Map<String, Object> params) {
        IPage<CategoryEntity> page = this.page(
                new Query<CategoryEntity>().getPage(params),
                new QueryWrapper<CategoryEntity>()
        );

        return new PageUtils(page);
    }

    @Override
    public List<CategoryEntity> getListTree() {
        List<CategoryEntity> categoryEntities = baseMapper.selectList(null);
        List<CategoryEntity> leve1Menu = categoryEntities.stream().filter(categoryEntity ->
                categoryEntity.getParentCid() == 0
        ).map((menu)->{
            menu.setChildren(getChildrens(menu,categoryEntities));
            return menu;
        }).sorted((menu1,menu2)->{
            return (menu1.getSort()==null?0:menu1.getSort()) - (menu2.getSort()==null?0:menu2.getSort());
        }).collect(Collectors.toList());


        return leve1Menu;
    }

    private List<CategoryEntity> getChildrens(CategoryEntity category,List<CategoryEntity> all) {
        List<CategoryEntity> children = all.stream().filter(categoryEntity -> {
            return categoryEntity.getParentCid() == category.getCatId();
        }).map(categoryEntity -> {
            categoryEntity.setChildren(getChildrens(categoryEntity,all));
            return categoryEntity;
        }).sorted((menu1,menu2)->{
            return (menu1.getSort()==null?0:menu1.getSort()) - (menu2.getSort()==null?0:menu2.getSort());
        }).collect(Collectors.toList());



        return children;
    }

    @Override
    public void removeMenuByIds(List<Long> asList) {
        //TODO 检查是否被引用
        baseMapper.deleteBatchIds(asList);
    }

//    @Override
//    public void updateDetail(CategoryEntity category) {
//        String name = category.getName();
//        if(!StringUtils.isEmpty(name)) {
//            QueryWrapper<CategoryBrandRelationEntity> wrapper = new QueryWrapper<>();
//            Long catId = category.getCatId();
//            wrapper.eq("catelog_id",catId);
//            CategoryBrandRelationEntity categoryBrandRelationEntity = new CategoryBrandRelationEntity();
//            categoryBrandRelationEntity.setCatelogName(name);
//            categoryBrandRelationService.update(categoryBrandRelationEntity,wrapper);
//            this.save(category);
//        }else {
//            this.save(category);
//        }
//    }

}
